/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ProjectSkyfire <http://www.projectskyfire.org/>
 * 
 * Copyright (C) 2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include "DatabaseEnv.h"
#include "Transaction.h"

//- Append a raw ad-hoc query to the transaction
void Transaction::Append(const char* sql) {
	SQLElementData data;
	data.type = SQL_ELEMENT_RAW;
	data.element.query = strdup(sql);
	m_queries.push_back(data);
}

void Transaction::PAppend(const char* sql, ...) {
	va_list ap;
	char szQuery[MAX_QUERY_LEN];
	va_start(ap, sql);
	vsnprintf(szQuery, MAX_QUERY_LEN, sql, ap);
	va_end(ap);

	Append(szQuery);
}

//- Append a prepared statement to the transaction
void Transaction::Append(PreparedStatement* stmt) {
	SQLElementData data;
	data.type = SQL_ELEMENT_PREPARED;
	data.element.stmt = stmt;
	m_queries.push_back(data);
}

void Transaction::Cleanup() {
	if (_cleanedUp)
		return;

	while (!m_queries.empty()) {
		SQLElementData const &data = m_queries.front();
		switch (data.type) {
		case SQL_ELEMENT_PREPARED:
			delete data.element.stmt;
			break;
		case SQL_ELEMENT_RAW:
			free((void*) (data.element.query));
			break;
		}

		m_queries.pop_front();
	}

	_cleanedUp = true;
}

bool TransactionTask::Execute() {
	if (m_conn->ExecuteTransaction(m_trans))
		return true;

	if (m_conn->GetLastError() == 1213) {
		uint8 loopBreaker = 5; // Handle MySQL Errno 1213 without extending deadlock to the core itself
		for (uint8 i = 0; i < loopBreaker; ++i)
			if (m_conn->ExecuteTransaction(m_trans))
				return true;
	}

	m_trans->Cleanup();

	return false;
}
